The next best thing to a VR headset is a simple Cardboard VR viewer. It’s the least expensive option for a somewhat immersive experience, with “look all around you” 3D vision and “hear things behind you” stereo sound. These headsets (which cost between $15 and $130 in the U.S.) are a quick and easy way to convert your mobile phone into a VR viewer.
How to do it: Cardboard viewers work along with your mobile phone, and are available in a range of styles from a range of companies, including ViewMaster (Mattel), DodoCase, Zeiss and Knox Labs (See a full list of Cardboard viewers here). For these viewers, you should download a VR app for iOS or Android, download individual videos, and then insert the phone into the viewer to experience them. Be sure to use your headphones / ear buds for stereo sound.